Cooler Master Real Power Pro 1000W PSU 10 Year Redux

Author:Paul Johnson

Editor:Kyle Bennett

Date: Monday , March 12, 2018

Doing computer PSU reviews for over a decade, and keeping full documentation on those, gives us ability to do something that whets computer PSU enthusiasts' appetites. We get to take some of those PSUs that have been in service for 10 years and retest those. Cooler Master is back on the load bank! How does it look after a decade of service?


When building a "new" PC one of the components that enthusiasts often reuse is their power supply. And why not? For the most part, the ATX12v/EPS standards over the years have not changed nearly as much as other facets and, barring some issues with efficiency and low power sleep states, most of the changes are not noticeable to the end user so long as they push the "on" button and the system powers up.

At the same time, since users do reuse power supplies a good bit, we have often been asked the question; what happens to a power supply after you have been using it for an extended period and how does it perform relative to when it was new? In partial answer to that question, we reevaluated the SilverStone Olympia 1000W back in March of 2015 after that unit had been in service for 7 years and the results were interesting.

Today, we have the opportunity to do the same thing once more. However, even when looking at a second example today we still do not have a definitive answer for you. Nor do we have a scientifically rigorous answer for you. What we DO have for you is another data point as we take a second look at the Cooler Master Real Power Pro 1000W (RS-C50-EMBA-D2) power supply that we first reviewed in 2008 that has been running in one of our office PCs (Pentium 4 EE 3.73Ghz, ASUS Stryker Extreme revA2, 2x Corsair CM2X1024-6400, GIGABYTE 7950GT, MAXTOR STM3160812AS, PIONEER DVR-111D) over the last 10 years. In this second look, we will be rerunning all of the load tests that we ran initially on this unit and then comparing how this particular sample performed 10 years ago to how it is performing today after all those years of use.

Did a Stacked Deck Win Over the Long Haul?

For those readers that are new to our reviews, or to this product, Cooler Master Co. LTD. is a company that is well known for producing enthusiast computer cases and has been in business for almost 25 years. In addition to cases Cooler Master has product lines for CPU and GPU heatsinks, case fans, various accessories, and power supplies. Cooler Master’s entry into the power supply market has been rather mixed with some good products, and some that could use improvement. The Real Power Pro line of products ranged in capacity from 550 watts to 1250 watts and the top end products we reviewed were produced in conjunction with Enhance.

At the time of the Real Power Pro 1000W's release, Cooler Master was positioning this product as one of their higher end products in the Real Power Pro line that we saw a couple of examples from (see the Real Power Pro 1250W review) and as part of a combo with the Stacker 830 case:

In order to satisfy more customers' demand for high-end PSU, Cooler Master is announcing the new series of PSU-Real Power Pro to continue Real Power series' well reputation. It complies with the newest Intel standard ATX 12V V2.2 and SSI standard EPS 12V V2.91 simultaneously.

In addition to the stable and clean power, the advanced features of this Power Supply include Quad GPU compatibility , Quad CPU support, and an 85% efficiency rating. With the world's first technology of six + 12V rails, Real Power Pro proves to be a spectacular performer, especially for workstation and high-end graphic card system, which includes 4 connectors for the most powerful PCI Express VGA Card.

When it came time to see if the rubber met the road, we found that, for its time and place, the Cooler Master Real Power Pro 1000W was indeed a premium product as it earned a Gold Award with our conclusion being this :

What do you get when you take a truly top of the line power supply and pair it with a top of the line case and sell the whole combination for $379.99 ($344.99 after MIR)? You get a combination in the Stacker 830SE & Real Power Pro 1000w that takes the one power supply truism, "Power supplies that come bundled with cases suck," and turns it on its ear. Sure there are some adequate power supplies bundled with some cases but the Real Power Pro 1000w is nothing short of one of the best power supplies we have had for review bar none. The Real Power Pro 1000w was so good that it completely bested the amazing performance of the Real Power Pro 1250w in all of our metrics today including voltage regulation, efficiency, and DC Output Quality while being able to deliver all of its power under all conditions tested..

At the current pricing, the Cooler Master Stacker 830SE & Real Power Pro 1000w combination looks to be a one stop shop for a high end case and power supply that is a solid value. Considering "low end 1000W" PSUs will cost you around $200, and the Cooler Master Real Power 1000w comes in at $299.99 alone, $45 or $50 "extra" for a Stacker 830 case certainly does not seem like a bad deal.

So, we know the Real Power Pro 1000W started off life as an award winning for its time power supply, but the question today is, has this unit’s performance changed over the last 10 years that this unit has been in service? Let's move on and see.